MAXQ3180 Maxim, MAXQ3180 Datasheet - Page 95

• Manufacturer Part Number: MAXQ3180
• Description: The MAXQ3180 is a dedicated electricity measurement front-end that collects and calculates polyphase voltage, current, power, energy, and many other metering and power-quality parameters of a polyphase load
• Manufacturer: Maxim

This register contains the calculated 16-bit arithmetic checksum over critical configuration and calibration registers.
It is updated on every DSP cycle. In use, the administrative processor records the value in the CHKSUM register and
then checks it periodically to verify that no configuration or calibration registers have changed. The MAXQ3180 sets
the CHSCH bit when this register’s value changes.
The registers included in the checksum calculation include the following:
Bit:
Name:
Reset:
Bit:
Name:
Reset:
PLS1_WD
PLS2_WD
SYS_KHZ
VOLT_CC
PLSCFG1
PLSCFG2
AMP_CC
PWR_CC
ENR_CC
CYCNT
THR1
Low-Power, Multifunction, Polyphase AFE
______________________________________________________________________________________
15
7
NOLOAD
B0FUND
R_ACFG
AVG_NS
REJ_NS
AVG_C
HPF_C
OCLVL
OVLVL
UVLVL
THR2
14
6
R_ADCRATE
R_ADCACQ
COM_TIMO
ACC_TIMO
NZX_TIMO
13
R_SPICF
5
ZC_LPF
I1THR
I2THR
Checksum High Byte
Checksum Low Byte
12
4
A.GAIN_LO
A.OFFS_LO
A.EF_GAIN
A.OFFS_HI
A.V_GAIN
A.E_GAIN
A.I_GAIN
A.PA0
A.PA1
A.PA2
11
3
Checksum (CHKSUM) (0x060)
B.GAIN_LO
B.OFFS_LO
B.EF_GAIN
B.OFFS_HI
B.V_GAIN
B.E_GAIN
10
B.I_GAIN
2
B.PA0
B.PA1
B.PA2
9
1
C.GAIN_LO
C.OFFS_LO
C.EF_GAIN
C.OFFS_HI
C.V_GAIN
C.E_GAIN
C.I_GAIN
C.PA0
C.PA1
C.PA2
8
0
95